Dental plugger



(No Model.)

R. H. ANTES. DENTAL PLUGGBR.

No. 326,537. PatentedSep't. 22,1885.

N. PETERS. Phomunwgmplwr. whingm ucl UNITED STATES PATENT OFFICE.

ROBERT H. ANTES, OF GENESEO, ILLINOIS.

DENTAL PLUGGER.

SPECIFICATION forming part of Letters Patent No. 326,537, dated September 22, 1885.

Application filed June l, 1885.

To all whom, it may concern,.-

Beit known that l, ROBERT H. ANTES, of

Geneseo, county of Henry, and State of Illi` nois, have invented certain new and useful Improvements in an Automatic Dental Mallet, of which the following is a full, clear, and exact description, that will enable others to make and use the same, reference being had to the accompanying drawings, forming a partofthis specification.

This invention relates to improvements in that class of dental instruments for which Letters Patent were granted to me on the 14th day of June, 1881, No. 242,853, and it consists of certain novel features in the construction, arrangement, and combination of the sevf eral parts, as will be hereinafter set forth.

The object of this invention is to simplify the construction set forth in the above patent, and provide an instrument of this character that will have a more direct and positive action.

Figure l is aside elevation showing the different parts in their normal position; Fig. 2, a side elevation and partial section showing the different parts in their opposite positions, and Fig. 3 a perspective of the spring employed to return the parts to their normal position.

Referring to the drawings, A represents a sliding metallic sleeve inclosing the central part of the shaft or tool-holding stock A. This metallic sleeve is in turn inclosed by a second sleeve, A2, composed of wood, which is stationary on the first sleeve and adapted to move therewith. The metallic sleeve is provided with the annular shoulder a, against which the upper end of the wooden sleeve abuts. The lower exterior end of the metallic sleeve is threaded for the engagement of the correspondingly-threaded thimble a', passing over the lower end of the stock A. By this means the wooden sleeve is removably secured in position relative to the metallic sleeve. The lower part, a2, of the wooden sleeve is enlarged, and is provided with a corrugated surface for the purpose of enabling the fingers of the operator to secure a rm hold and guard against the possibility of the instrument slipping in the hand.

An annular space or chamber, a?, is pro- (No model.)

vided between the stock and the metallic sleeve, as shown in Fig. 2, in which may be placed asmall quantity of waste or other suitable absorbent material for the purpose of preventing the lubricant employed to facilitate the movement of the sliding sleeve on the stock A from escaping and soiling the fingers.

The inner end of the arm B is removably secured to the upper end of the stock A and extends at right angles therefrom, the outer end having aslight upward curvature and being bifurcated so as to clasp the two sides of the flattened portion of the mallet-handle ai* and provide the pivotal or fulcrum bearing a5 at a point removed from the end, as shown.

The arm B is provided near its longitudinal lcenter with the downwardly-projecting lugb, to which the oscillating lever C is secured by means of the pivot-pin b', forming a central axial bearing for said lever. The horizontal lever C runs parallel with and is located directly underneath the arm B. The vertical rod C forms the connection between the sliding sleeve A and the lever C, the upper end being pivoted to the inner end of said lever, and the lower end secured in a like manner to the laterally-projecting lug b2, formed on the sleeve A. The outer end of the lever C is connected to the end of the mallet-handle by means of the pivoted link D.

The upper end of the V-spring E is provided with the flat head d, the inner edge of which is adapted to engage with a slot, d', in the lug b, whereby said spring is retained in the required position, the upper limb resting against the` under side of the supporting-arm B, while the lower end or limb bears loosely on the upper side of the lever O. The function of this spring is to automatically throw the mallet back to its normal position after the delivery of each blow. The mallet or hammer F will ordinarily be composed of any metallic material found to be suitable for the purpose, while the handle will be composed of wood.

In operation the mallet is depressed to de liver the blow on the upper end of the toolholding stock by the pressure on the point of the instrument, and raised by means of the spring described, the instrument being thus actuated by the pressure and relaxation of IOO pressure, enabling the operator to accurately govern and vary the force of the blow as the necessity of the case may require.

It is of course obvious that slight changes might be resorted to without involving a departure from the spirit of my invention; and I would therefore have it understood that I do not limit or confine myself to the exact construction and arrangement of the parts shown and described, but may make such changes as come within the spirit and scope of my invention.

Having thus described my inventiou,what I claim as new, and desire to secure by Letters Patent, is-4 1. The combination, with a tool-holding stock, of an arm extending at right angles thereto, and having the outer end curved upward, as described, and a mallet or hammer, the handle whereof is pivoted to the curved end of said arm, substantially as and for the purpose set forth.

2. In a dental instrument, the combination, with the stock or shaft, of a sliding sleeve provided with a laterally-projecting lug, a connecting-rod, an oscillating lever, an arm secured to the upper end of said stock and provided with a downwarly-projecting lug, a mallet or hammer, and the means for connecting the outer end of said lever and mallet-handle, whereby a downward movement of the sleeve on the stock causes the hammer to descend and strike a blow, substantially as described.

3. In a dental instrument, the combination, with a supporting-arm, of an oscillating lever, a mallet, and the means described for automatically returning said mallet to a normal position when the pressure is relaxed on the point of the instrument, substantially as set forth.

\ ROBERT H. ANTES.

lVitnesses: II. T. ANTES, E. C. MODERWELL. 

